.mainTitle {
    text-align: center;
}

body {
    margin: 0;
    padding: 0;
    cursor: url(images/黑.png), auto;
    background: url(/images/背景图.jpg) no-repeat center center fixed;
    background-size: cover;
    overflow: hidden;
    height: 100%;
    width: 100%;
}

.start,
.regret,
.giveUp,
.playAgain,
.closeMusic,
.openMusic {
    background: bisque;
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    width: 100px;
    margin-left: 15px;
    margin-right: 15px;
}